Mill-frame.



PatentedAug. 7, I900.

A. M. ZIMMERMAN. MILL FRAME.

(Application fiiv! Oct. 5, 1897.)

4 Sheets-Sheet I,

(No Model.)

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P N m u A MR F .L n MM A (Application filed Oct. 5, 1897.)

4 Sheets-Sheet 2,

(No Model.)

w: mums pzrzns w, mow uwa, WASHXNGYON u c Patented Aug. 7, I900.

A. M. ZIMMERMAN.

M l L L F B A M E.

(Application filed Oct. 5, 1897.)

4 Shank-Sheet 3,

(No Model.)

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' Patented Aug. 7, I900. A. m. ZIMMERMAN.

MILL FRAME.

(Application filed Oct. 5, 1897.)

4 Sheets-Sheet 4,

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UNITED STATES PATENT OFFICE.

ABRAHAM M. ZIMMERMAN, OF NElV HOLLAND, PENNSYLVANIA.

MILL-FRAME.

SPECIFICATION forming part of Letters Patent No. 655,293, dated August 7, 1900. Application filed October 5, 1897. Serial No. 654,109. (No model.)

To all whom it may concern.-

Be it known that I, ABRAHAM M. ZIMMEB- MAN, a citizen of the United States, residing at New Holland, in the county of Lancaster and State of Pennsylvania, have invented certain Improvements in Mill-Frames, of'which the following is a specification.

This invention relates to improvements in that class of grist-mills known as portable mills, and the objects of my improvements are, first, to so construct the mill-frame that the same maybe adjusted to locate a pulley on the shaft of the running stone, so that an axial plane of a horizontal shaft located above or below said pulley and from which motion is to be communicated to that pulley may pass transversely through said pulley; second, to secure the stationary stone to its head more securely than is done at present; third, to improve the bearing for the shaft or spindle carrying the running stone, and, fourth, to adjust the position of the running stone with reference to the stationary stone.

The invention consists in the construction and combination of the various parts, as hereinafter fully described and then pointed out in the claims.

In the accompanying drawings, which form a part of this specification, Figure 1 is a side elevation of a mill embodying my invention, the parts being shown in their normal positions; Fig. 2, a front elevation; Fig. 3, a side elevation showing the mill tilted from the perpendicular; Fig. 4, a section on broken line 4 4 of Fig. 1; Fig. 5, an enlarged vertical section of the bearing supporting the shaft of the running stone; Fig. 6, an elevation of the millstones detached from the frame, parts being cut away to show the manner of securing the stationary stone to the head; Fig. 7, a side elevation of a portion of the frame of a vertical mill, showing the application thereto of my improved bearing for the shaft of the running stone; and Fig. 8 is an axial vertical section in a plane at right angles to that of Fig. 2, showing thestationary stone and the running stone within the casing, the hopper being detached.

Similar letters indicate like parts throughout the several views.

Referring to the details of the drawings, A indicates the two posts of the frame, located on opposite sides of the mill.

B indicates the two sills, to each of which is pivoted oneof the posts A,- and b indicates the pins pivoting the posts to the sills.

A, A and A are respectively the bottom, intermediate, and top cross beams of the frame.

B indicates an upright shaft passing through bearings a, a and a of cross-beams A, A and A respectively, and to which the running stone D, Fig. 6, is rigidly secured, and B is the pulley on shaft B and through which motion is communicated by a belt. (Shownby broken lines W, Figs. 1 and 3.)

Eindicates diagonal braces for the posts A, which braces have their lower extremities pivoted to corresponding ends of sills B by pins 1). The'upper ends of bracesE have longitudinal slots 6 formed therein, and these slots engage threaded pins 6 in the sides of the posts. On pins 6 are washers e that lap the sides of the slots 6, the washers being secured on the pins by nuts 6 whereby the braces are clamped in an adjusted position against the sides of posts A.

F indicates the hopper, and F the shoe, whereby grain is fed to the mill. The delivery end of the hopper is supported by arms f, rigidly secured thereto, the lower ends of said arms being pivotally connected with lugs f on the case D surrounding the millstones. On the ends of sills B, opposite those to which braces E are attached, are pivoted rocking posts G, on the upper ends of which are pivoted links G, having their upper ends rigidly secured to the outer extremity of hopper F, as shown at g, Figs. 1 and 3. The other details of the construction for feeding grain to the mill are not described, as they do not form any part of my invention.

transmit motion directly from the horizontal shaft to the pulley. In my invention, therefore, the posts of the mill-frame and those of the hopper are hinged to their supports, as

shown and described, in such manner that the mill-frame may be adjusted to such an angle that an axial plane through a horizontal shaftfrom which motion is communicated to the pulley on the shaft of the running stone and 1 which horizontal shaft is located above or be- The diagonal braces E conform to the movement of the posts by reason of their-being pivoted to sills B, as shown at b, and the hopper also conforms to the movement of said posts because of the hinged connections of its support, and said hopper is at all times maintained in an approximately-horizontal through an opening in the cap D said verti-cal part of the bolt having its upper end (1 threaded, and this threaded end is engaged by a nut d more of these angular bolts, so that the counter presSure thereof holds their horizontal parts in engagement with the stone, and the nuts d serve to adjust the stone in the cap. lffpreferable, the parts 01 of the bolts maybe secured in the openings in the stone by cement or wedges; but this is not necessary.

The bearing or step for the foot 12 Fig. 5, of the shaft B" comprises a cylindrical box H, having a semicircular recess h in the under side of the bottom thereof and which takesover a semicircular stud K, Fig. 2, on a lever K, to be described. Resting on the bottom of box H is an annular plate H, Fig. 5, having a 'circulargroove therein, in which play a number of antifriction-rollers h, and resting on these antifriction-rollers is a plate H similar to plate I-I, but which has aci-r cu'lar groove in its lower'face that takes over 'antifriction-rollers h. The foot b of the spindle is cylindrical in cross-section and engages a similarly-shaped opening 72. in plate H This constructionafiords a bearing for the spindle that permits all of the .parts to revolve upon theirsupports.

In my improvement I connect the parts I There may be three, four, orv

The lever Kpc'arryhig shaft 13, has'one end K pivoted at Z to a yielding rod L, which extends upward and passes loosely through an opening in an arm L, projecting from one of the posts, and through the top and bottom plates m and m, respectively, of a frame M, the top plate m whereof serves as a bearing for a spring S, coiled around rod L, between said plate m and the arm L, the lower end of spring S bearing on arm L. The upper end "ofrod L is threaded, and this threaded end is engaged by a hand-nut ll/I, which bears upon the top of plate m. The other end K of lever K is supported by a rod L that passes up through a boss at on cross-beam A and has its upper end threaded andengaged by a nut Z, which bears upon boss 0. and supports rod L The 'p'osi tion'ofthe runner with reference to the 'stationarystone is re'gulated by nuts M and Z, and should any foreign matter of unusual size :get between the stones the spring S enables the runner to yield automatically. 7

The frame is divided horizontally into seetions, as shown at N, Figs. 1, 2, and 3, that the upper or both millst'on'es may be removed ford ressing'or for other purp oses. Above the division-line N and on the outer face of the upper sections of the posts are brackets'N, and on the lower 'secti'on's'of the posts, below brackets N, are brackets N Through open, ings in cars it and n of brackets N and N respectively, are passed bolts N secured in place by nuts n whereby the two se'ctionsof the mill are deta'ehablysecured together. On the lower ends of the vertical platesof brackets N are downwardly extending lips n, which when thesections of the posts 'arejoine'd together lap the tops of the 'lower'seetion's thereof to prevent lateral movement of the upper sections.

In Fig. 7 is illustrated the application of the bearin g of the shaft of the runningston'e and the lever supporting the same to a mill in which the stones operate vertically. In this construction the box H is so set that the plates H and H occupy a vertical position. The lever K is fulcrumed in the eenter to an -arm K the fulcrum K engaging a slot K in arm K I-do not restrict myself to the detai-ls of construction herein shown and described, as is obvious that many alterations may be made therein without'departing from the spirit-and scope of my invention.

Having thus described myinventionflvhat I claim as new, and desire to secure lay-Letters Patent, is-

1. The combination, in a mill of the charaeter described, of a base, a support forthe mill hinged to the base, means for securing said support inan adjusted position, arins secured to the delivery end'of the hopper and hinged to the mill-casin g, and a support for the rear of the hopper having a pivot connection with the base, for the purpose specified.

2. The combination, in a mill of the character described, of a base, a support for the mill hinged to the base, means for securing said support in an -adjusted position, arms secured to the delivery end of the hopper and hinged to the mill-casin g, posts pivoted to the base, and links pivoted to the upper ends of said posts and secured to the rear end of the IQ hopper, substantially as and for the purpose specified.

ABRAHAM M. ZIMMERMANa Witnesses:

O. B. PLEAM,

J NO. H. SENSENIG; 

